Electron and hole contributions to normal-state transport in the superconducting system
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
Indium-doped SnTe has been of interest because the system can exhibit both topological sur- face states and bulk superconductivity. While the enhancement of the superconducting transition temperature is established, the character of the electronic states induced by indium doping remains poorly understood. We report a study of magneto-transport in a series of Sn1-xInxTe single crystals with 0:1 ≤ x ≤ 0:45. From measurements of the Hall effect, we find that the dominant carrier type changes from hole-like to electron-like at x ~ 0:25; one would expect electron-like carriers if the In ions have a valence of +3. For single crystals with x = 0:45, corresponding to the highest super- conducting transition temperature, pronounced Shubnikov-de Haas oscillations are observed in the normal state. In measurements of magnetoresistance, we nd evidence for weak anti-localization (WAL). We attribute both the quantum oscillations and the WAL to bulk Dirac-like hole pockets, previously observed in photoemission studies, which coexist with the dominant electron-like carriers.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1466623
- Alternate ID(s):
- OSTI ID: 1463759
- Report Number(s):
- BNL-207980-2018-JAAM; PRBMDO
- Journal Information:
- Physical Review B, Vol. 98, Issue 5; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Superconductivity of Topological Surface States and Strong Proximity Effect in Sn 1− x Pb x Te–Pb Heterostructures
|
journal | November 2019 |
Band structure engineering in Sn 1.03 Te through an In-induced resonant level
|
journal | January 2020 |
Superconductivity of Topological Surface States and Strong Proximity Effect in Sn 1–x Pb x Te‐Pb Heterostructures
|
journal | September 2020 |
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